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Liu L, Li H, Li J, Li X, Hu N, Sun J, Zhou W. Chloroplast genomes of Caragana tibetica and Caragana turkestanica: structures and comparative analysis. BMC PLANT BIOLOGY 2024; 24:254. [PMID: 38594633 PMCID: PMC11003120 DOI: 10.1186/s12870-024-04979-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 04/02/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND The genus Caragana encompasses multiple plant species that possess medicinal and ecological value. However, some species of Caragana are quite similar in morphology, so identifying species in this genus based on their morphological characteristics is considerably complex. In our research, illumina paired-end sequencing was employed to investigate the genetic organization and structure of Caragana tibetica and Caragana turkestanica, including the previously published chloroplast genome sequence of 7 Caragana plants. RESULTS The lengths of C. tibetica and C. turkestanica chloroplast genomes were 128,433 bp and 129,453 bp, respectively. The absence of inverted repeat sequences in these two species categorizes them under the inverted repeat loss clade (IRLC). They encode 110 and 111 genes (4 /4 rRNA genes, 30 /31tRNA genes, and 76 /76 protein-coding genes), respectively. Comparison of the chloroplast genomes of C. tibetica and C. turkestanica with 7 other Caragana species revealed a high overall sequence similarity. However, some divergence was observed between certain intergenic regions (matK-rbcL, psbD-psbM, atpA-psbI, and etc.). Nucleotide diversity (π) analysis revealed the detection of five highly likely variable regions, namely rps2-atpI, accD-psaI-ycf4, cemA-petA, psbN-psbH and rpoA-rps11. Phylogenetic analysis revealed that C. tibetica's sister species is Caragana jubata, whereas C. turkestanica's closest relative is Caragana arborescens. CONCLUSIONS The present study provides worthwhile information about the chloroplast genomes of C. tibetica and C. turkestanica, which aids in the identification and classification of Caragana species.
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Affiliation(s)
- LiE Liu
- College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China
| | - HongYan Li
- College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China
| | - JiaXin Li
- College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China
| | - XinJuan Li
- College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China
| | - Na Hu
- Qinghai Provincial Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
| | - Jing Sun
- Qinghai Provincial Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
| | - Wu Zhou
- College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China.
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Park JY, Kang SD, Son YG, Kim JY, Lee G, Kim KD, Lee SW, Kim JY. Eucalyptus globulus leaf-isolated isorhapontin serves as a natural insecticide via acetylcholinesterase inhibition. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 200:105834. [PMID: 38582576 DOI: 10.1016/j.pestbp.2024.105834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 04/08/2024]
Abstract
Acetylcholinesterase (AChE) inhibitors cause insect death by preventing the hydrolysis of the neurotransmitter acetylcholine, which overstimulates the nervous system. In this study, isorhapontin, isolated from E. globulus leaves, was evaluated as a natural insecticide with AChE inhibition at 12.5 μM. Using kinetic analyses, we found that isorhapontin acted as a competitive inhibitor that binds to the active site of AChE. The inhibition constant (Ki) was 6.1 μM. Furthermore, isorhapontin and resveratrol, which have basic skeletons, were predicted to bind to the active site of AChE via molecular docking. A comparison of the hydrogen bonding between the two stilbenes revealed characteristic differences in their interactions with amino acids. In isorhapontin, Trp83, Gly149, Tyr162, Tyr324, and Tyr370 interacted with the sugar moiety. These results suggest that with further development, isorhapontin can be used as an insecticide alternative.
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Affiliation(s)
- Jae Yeon Park
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Seong Doo Kang
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Yun Gon Son
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Ju Yeon Kim
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Gihwan Lee
- Division of Applied Life Science (BK21 Four), ABC-RLRC, PMBBRC, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Kwang Dong Kim
- Division of Applied Life Science (BK21 Four), ABC-RLRC, PMBBRC, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Sang Won Lee
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea.
| | - Jeong Yoon Kim
- Department of Pharmaceutical Engineering, IALS, ABC-RLRC, Gyeongsang National University, Jinju 52725, Republic of Korea.
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Liu L, Li H, Li J, Li X, Hu N, Wang H, Zhou W. Chloroplast genome analyses of Caragana arborescens and Caragana opulens. BMC Genom Data 2024; 25:16. [PMID: 38336648 PMCID: PMC10854190 DOI: 10.1186/s12863-024-01202-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND Numerous species within the genus Caragana have high ecological and medicinal value. However, species identification based on morphological characteristics is quite complicated in the genus. To address this issue, we analyzed complete plastid genome data for the genus. RESULTS We obtained chloroplast genomes of two species, Caragana arborescens and Caragana opulens, using Illumina sequencing technology, with lengths of 129,473 bp and 132,815 bp, respectively. The absence of inverted repeat sequences in the two species indicated that they could be assigned to the inverted repeat-lacking clade (IRLC). The genomes included 111 distinct genes (4 rRNA genes, 31 tRNA genes, and 76 protein-coding genes). In addition, 16 genes containing introns were identified in the two genomes, the majority of which contained a single intron. Repeat analyses revealed 129 and 229 repeats in C. arborescens and C. opulens, respectively. C. arborescens and C. opulens genomes contained 277 and 265 simple sequence repeats, respectively. The two Caragana species exhibited similar codon usage patterns. rpl20-clpP, rps19-rpl2, and rpl23-ycf2 showed the highest nucleotide diversity (pi). In an analysis of sequence divergence, certain intergenic regions (matK-rbcL, psbM-petN, atpA-psbI, petA-psbL, psbE-petL, and rps7-rps12) were highly variable. A phylogenetic analysis showed that C. arborescens and C. opulens were related and clustered together with four other Caragana species. The genera Astragalus and Caragana were relatively closely related. CONCLUSIONS The present study provides valuable information about the chloroplast genomes of C. arborescens and C. opulens and lays a foundation for future phylogenetic research and molecular marker development.
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Affiliation(s)
- LiE Liu
- School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China
| | - Hongyan Li
- School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China
| | - Jiaxin Li
- School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China
| | - Xinjuan Li
- School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China
| | - Na Hu
- Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
| | - Honglun Wang
- Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China
| | - Wu Zhou
- School of Ecological and Environmental Engineering, Qinghai University, Xining, 810016, China.
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O'Day DH. Phytochemical Interactions with Calmodulin and Critical Calmodulin Binding Proteins Involved in Amyloidogenesis in Alzheimer's Disease. Biomolecules 2023; 13:biom13040678. [PMID: 37189425 DOI: 10.3390/biom13040678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/03/2023] [Accepted: 04/13/2023] [Indexed: 05/17/2023] Open
Abstract
An increasing number of plant-based herbal treatments, dietary supplements, medical foods and nutraceuticals and their component phytochemicals are used as alternative treatments to prevent or slow the onset and progression of Alzheimer's disease. Their appeal stems from the fact that no current pharmaceutical or medical treatment can accomplish this. While a handful of pharmaceuticals are approved to treat Alzheimer's, none has been shown to prevent, significantly slow or stop the disease. As a result, many see the appeal of alternative plant-based treatments as an option. Here, we show that many phytochemicals proposed or used as Alzheimer's treatments share a common theme: they work via a calmodulin-mediated mode of action. Some phytochemicals bind to and inhibit calmodulin directly while others bind to and regulate calmodulin-binding proteins, including Aβ monomers and BACE1. Phytochemical binding to Aβ monomers can prevent the formation of Aβ oligomers. A limited number of phytochemicals are also known to stimulate calmodulin gene expression. The significance of these interactions to amyloidogenesis in Alzheimer's disease is reviewed.
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Affiliation(s)
- Danton H O'Day
- Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
- Department of Biology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
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Adewole AH, Famuyide IM, McGaw LJ, Selepe MA, October N. Antifungal Compounds from the Leaves of Rhynchosia minima. Chem Biodivers 2022; 19:e202200837. [PMID: 36305375 DOI: 10.1002/cbdv.202200837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/26/2022] [Indexed: 12/27/2022]
Abstract
Rhynchosia minima, commonly known as jumby bean, is used as a remedy for respiratory ailments in various parts of the world. It is also used by South African traditional healers to treat heart or chest pain. This study aimed to investigate the bioactive constituents of the leaf extracts of R. minima against selected fungal isolates that have been identified as risk factors in respiratory illness. Rhynchosia minima leaves were extracted sequentially using hexane, dichloromethane, ethyl acetate and methanol in increasing order of polarity. The extracts were subjected to repeated chromatographic techniques, for phytochemical isolation. The extracts and isolated compounds were screened against Candida albicans and Cryptococcus neoformans by determining the minimum concentration that inhibited fungal growth. Six flavonoids, one norisoprenoid and one cyclitol were isolated and characterized by 1D and 2D NMR and HR-ESI-MS. The extracts obtained in the study had moderate to weak antifungal activities, with MICs ranging from 312.5 to 1250.0 μg/mL against both fungi. Four isolated compounds were also screened, with two of them exhibiting activity against C. albicans (MIC=6.25 μg/mL) that was comparable to amphotericin B, the positive control. These two compounds also had better antifungal potential against C. neoformans with an MIC=6.25 μg/mL, compared to the MIC of 12.5 μg/mL of amphotericin B. Seven of the eight isolated compounds were obtained from the extracts of Rhynchosia minima for the first time. Two of the isolated compounds demonstrated activity comparable or superior to amphotericin B activity. The notable potency displayed by these compounds warrants further investigation on their development as antifungal agents.
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Affiliation(s)
- Adetola H Adewole
- Department of Chemistry, University of Pretoria, Hatfield, Pretoria, 0002, South Africa
| | - Ibukun M Famuyide
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Lyndy J McGaw
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Mamoalosi A Selepe
- Department of Chemistry, University of Pretoria, Hatfield, Pretoria, 0002, South Africa
| | - Natasha October
- Department of Chemistry, University of Pretoria, Hatfield, Pretoria, 0002, South Africa
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Foudah AI, Devi S, Alqarni MH, Alam A, Salkini MA, Kumar M, Almalki HS. Quercetin Attenuates Nitroglycerin-Induced Migraine Headaches by Inhibiting Oxidative Stress and Inflammatory Mediators. Nutrients 2022; 14:nu14224871. [PMID: 36432556 PMCID: PMC9695045 DOI: 10.3390/nu14224871] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/15/2022] [Indexed: 11/19/2022] Open
Abstract
This study aimed to investigate the antimigraine potential of quercetin in migraine pain induced by nitroglycerin (NTG), 10 mg/kg, intraperitoneal injection in rats. Quercetin was administered orally for 1 week, and behavioral parameters associated with pain were assessed 30 min after NTG injection. At the end of the study, the rats were killed so that immunohistochemical examination of their brains could be performed. The time and frequency of rearing and sniffing in the category of exploratory behavior, walking in the category of locomotor behavior, and total time spent in the light chamber were reduced in the disease control group compared with the normal group during the assessment of behavioral parameters. Pathologic migraine criteria, such as increased levels of calcitonin gene-related peptide and increased release of c-fos cells, were more prominent in the caudal nucleus triceminalis of the NTG control group. In the treatment groups, behavioral and pathological measures were less severe after pretreatment with quercetin at doses of 250 and 500 mg/kg. Therefore, it was concluded that quercetin improved the pain behavior of migraine patients in the NTG-induced migraine rat model. Quercetin is thought to have antimigraine effects due to its antioxidant and anti-inflammatory potential. Quercetin may therefore be a novel agent that can treat or prevent migraine pain and associated avoidance behaviors.
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Affiliation(s)
- Ahmed I. Foudah
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
- Correspondence: (A.I.F.); (A.A.)
| | - Sushma Devi
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India
| | - Mohammed H. Alqarni
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Aftab Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
- Correspondence: (A.I.F.); (A.A.)
| | - Mohammad Ayman Salkini
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Manish Kumar
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India
- Department of Neurosurgery, College of Medicine, Penn State Health Milton S. Hershey Medical Center, The Pennsylvania State University, State College, PA 17033-0850, USA
| | - Husam Saad Almalki
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
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Mohamed Yusof NIS, Abdullah ZL, Othman N, Mohd Fauzi F. Structure–Activity Relationship Analysis of Flavonoids and Its Inhibitory Activity Against BACE1 Enzyme Toward a Better Therapy for Alzheimer’s Disease. Front Chem 2022; 10:874615. [PMID: 35832462 PMCID: PMC9271896 DOI: 10.3389/fchem.2022.874615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 05/16/2022] [Indexed: 11/18/2022] Open
Abstract
Drug development in Alzheimer’s disease (AD) suffers from a high attrition rate. In 2021, 117 agents tested in phases I and II and 36 agents tested in phase III were discontinued. Natural product compounds may be good lead compounds for AD as they contain functional groups that are important for binding against key AD targets such as β-secretase enzyme (BACE1). Hence, in this study, 64 flavonoids collected from rigorous literature search and screening that have been tested from 2010 to 2022 against BACE1, which interferes in the formation of amyloid plaque, were analyzed. The 64 unique flavonoids can be further classified into five core fragments. The flavonoids were subjected to clustering analysis based on its structure, and each representative of the clusters was subjected to molecular docking. There were 12 clusters formed, where only 1 cluster contained compounds from two different core fragments. Several observations can be made where 1) flavanones with sugar moieties showed higher inhibitory activity compared to flavanones without sugar moieties. The number of sugar moieties and position of glycosidic linkage may also affect the inhibitory activity. 2) Non-piperazine-substituted chalcones when substituted with functional groups with decreasing electronegativity at the para position of both rings result in a decrease in inhibitory activity. Molecular docking indicates that ring A is involved in hydrogen bond, whereas ring B is involved in van der Waals interaction with BACE1. 3) Hydrogen bond is an important interaction with the catalytic sites of BACE1, which are Asp32 and Asp228. As flavonoids contain favorable structures and properties, this makes them an interesting lead compound for BACE1. However, to date, no flavonoids have made it through clinical trials. Hence, these findings may aid in the design of highly potent and specific BACE1 inhibitors, which could delay the progression of AD.
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Affiliation(s)
| | | | - Norodiyah Othman
- Faculty of Pharmacy, Universiti Teknologi MARA Selangor, Selangor, Malaysia
- Haematology Unit, Cancer Research Centre, Institute for Medical Research, National Institutes of Health Complex, Selangor, Malaysia
| | - Fazlin Mohd Fauzi
- Faculty of Pharmacy, Universiti Teknologi MARA Selangor, Selangor, Malaysia
- Collaborative Drug Discovery Research, Faculty of Pharmacy, Universiti Teknologi MARA Selangor, Selangor, Malaysia
- *Correspondence: Fazlin Mohd Fauzi,
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